New bolts are always recommended. I replace bolts if a harmonic balancer comes off. A new harmonic balancer is good maintenance. I'll have to check the design and installation. If a leak is found, I'll replace all three components later.

The pan gasket will be a challenge. I doubt it can be harder than doing in car timing chains on a GM 3.6L transverse engine. It took me three months on that job. I took my time and replaced a lot of parts at the same time. Our Acadia rides like a champ. It can take anywhere with 175k miles on it. Hopefully my notes and parts list is complete. I'll post pictures next week. Working on it July 6th-8th.

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'06 X5 3.0i - bought @143,123 miles (12/26/20)